|
Chinese Elm, Ulmus
Parvifolia Bonsai Tree Care Sheet
Hardy/Deciduous or
Semi-evergreen/Easy to keep/Good for beginners

Introduction.
This Bonsai tree care guide describes how to look after a Chinese Elm
Bonsai tree. The Chinese Elm is part of a
genus of 45 species of Elms, the Chinese Elm is the most popular Elm
used in the art of Bonsai, but there are other members of
this genus that are also suitable for Bonsai cultivation. The Chinese Elm
is arguably one of the top three best beginner Bonsai trees available, the only other
species even better suited for indoor Bonsai would be Ficus and Crassula
(Money Tree) but with proper care the Chinese Elm can do well indoors
and is considered an easy beginner Bonsai tree.
Where To Keep
Them/Watering.
Chinese Elms are most
commonly sold as indoor Bonsai trees, however the
Chinese Elm is fully frost hardy and it can be kept
indoors or outdoors. However your Chinese Elm Bonsai must
be acclimatized to the cold before placing it outdoors, and
needs to be outdoors all autumn to be able
to gradually get used to the drop in temperature,
you should never place a Chinese Elm Bonsai
tree that has been grown inside straight outside in
winter. If you do place your Bonsai tree outside for
the winter it is a good idea to place it in a greenhouse, as
cold winds can cause some of the finer branches and twigs to die
back, if you don't have a greenhouse you could also place some
special fleece over your Bonsai tree to help protect it from
cold winds, placing your Bonsai in a sheltered spot in the
garden will also help. It is also a good idea to put some sort
of mulch, (straw/ soil or bark) around the pot to help
protect the roots of your Bonsai tree. You also need to keep
checking to see if your Bonsai tree needs watering as even in winter
you shouldn't let the Bonsai soil dry out, however waterings in
winter will most likely be few and far between. Chinese Elms
will enjoy spending as much time outside as possible in summer and
as mentioned above can be left outside all year, however with the
right conditions Chinese Elms can also do well indoors.
To keep your Chinese Elm Bonsai tree indoors, you should
place your Bonsai tree on a cool bright window sill that is
well away from a heat source, a humidity tray is also strongly
recommended for an indoor Bonsai tree, the tray should be
a few inches larger in width and length than the Bonsai pot,
and the Bonsai pot should not come in to direct contact with
the water in the tray, the feet of the Bonsai pot should be placed on some
small stones to raise the pot above the waters surface, or you could place fine gravel up
to the rim of the tray and place the Bonsai pot on top of the gravel.
Make sure the humidity tray has the water topped up at all times
and as the water evaporates it will rise up through the leaves of your
Bonsai tree and help to keep the local area more humid. Watering of indoor
and outdoor Chinese Elms is similar in the fact that you should never let
the Bonsai soil completely dry out and you should never keep it constantly wet. However
an outdoor Chinese Elm may need more frequent watering especially when it is
exposed to hot sun and warm winds, it is often necessary to water outdoor Bonsai
once sometimes twice a day during summer, in both situations check the soil
daily and only water when the soil is slightly dry on
the surface, if you are not sure, you can check to see if
there is moisture lower down in the pot by sticking a wooden chop stick
in the soil down to the bottom of the pot, then leave it for
few minutes, if the chop stick comes out fairly dry then it's
time to water, if it comes out fairly moist you may be able
to leave it a day or so longer. Both indoor
and outdoor Chinese Elm Bonsai trees will need less water during
winter, this is because the tree wont be in active growth
and also the temperature will be lower so moisture wont evaporate out of the Bonsai
pot as quickly. The amount you will need to water your Bonsai tree will also
depend on the size of your Bonsai tree, the size of
the Bonsai pot and how moisture retentive the Bonsai soil is, but if
you follow the advice above you should be
ok. Repotting/Wiring/Feeding/And Pruning.
You should aim to repot your Chinese Elm Bonsai
tree in spring before the leaves are fully open, although indoor specimens can be re-potted pretty
much any time of year. If your Bonsai tree has a good
root system you should be able to gently lift it out of the
pot in spring (you may need to snip the Wire underneath the pot if the
Bonsai tree is wired in) and take a look at the roots to see if they are
pot bound, if so you should repot your Bonsai tree, if the roots
seem ok then leave re-potting till the following year. when it does become necessary to repot your
Chinese Elm, you should use a good quality free draining Bonsai soil.
Akadama Bonsai soil is an excellent choice and can be used on it's own or
if you require a more moisture retentive Bonsai soil you could add some fine
potting bark to it, Moler Bonsai soil is another good choice, again you
could use it on it's own or add some potting bark,
you can also add pumice granules to your soil mix as this
aids drainage but also holds moisture for your Bonsai tree. It is important
not to fertilize your Bonsai tree for around four weeks
after re-potting as doing so can burn the new roots that your Bonsai tree will be
developing, after this period carry on fertilizing as usual. You should fertilize
your Bonsai tree from spring onwards with a balanced fertilizer such as Chempak, you
will usually fertilize your Bonsai tree once a week but feeding guidelines will differ from brand to brand
so it is best to refer to the instructions on the particular brand
you decide to use. Outdoor Chinese Elms wont need feeding during winter and
indoor feeding can be reduced to once a month. If you need to wire
your Bonsai tree the best time to do this is between late
spring and mid autumn although indoor Elms can be wired at any time of
year, healthy Bonsai trees can be defoliated to enable easier wiring, you can then
leave the wires on for up to a year, but keep checking
them to make sure they don't start cutting in to the bark of your Bonsai
tree, if this problem occurs the wires will need to be removed and
replaced if necessary. Allow new growth on your Chinese Elm to
extend to three or four sets of leaves, then trim the new growth
back to one or two leaves as required. If it is necessary to remove a
large branch it a good idea to remove it in mid summer, as
the sap inside your Bonsai tree will be flowing well at this time
and this will aid in faster and better healing of the
wound, large wounds should also be covered in Bonsai cut paste to aid the
healing process.
The best way to ensure you keep
your Bonsai tree healthy is to do as much research as possible(Internet
and or books) on the particular species you own and also Bonsai in
general as this will give you a broader understanding of the
subject and will give you a far better chance of success with your
Bonsai tree.
I hope this care sheet has been of
interest and helpful to you, if so you might want to read the other
care sheets on this site. It is up to you
to use the information given here responsibly and Bargain Bonsai holds no responsibility as
to how you use it.
|